> ## Documentation Index
> Fetch the complete documentation index at: https://docsautomator.co/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Airtable: Attachment URL Issue When Sending Emails

> Resolve 'attachment URL is disallowed' errors in Airtable automations

## Problem

When sending generated files as attachments via Airtable automation, you receive an attachment URL error message: "an attachment url is disallowed"

## Root Cause

The automation fires before the attachment is fully uploaded to Airtable's storage system, causing the URL to become invalid.

## Solution

Implement a waiting mechanism using a formula field that matches Airtable's file storage URL pattern. This ensures the file upload completes before the automation triggers.

### Implementation Steps

<Steps>
  <Step title="Create a Formula Field">
    Add a formula field in your Airtable table that checks for valid attachment URLs
  </Step>

  <Step title="Add Condition to Automation">
    Configure your automation to only trigger when the formula field indicates the attachment is ready
  </Step>

  <Step title="Test the Workflow">
    Run a test to ensure the automation waits for the attachment to fully upload
  </Step>
</Steps>

## Additional Resources

For detailed instructions, refer to Airtable's official troubleshooting documentation:

<Card title="Airtable Support Article" icon="external-link" href="https://support.airtable.com/docs/troubleshooting-airtable-automations">
  Troubleshooting Airtable Automations - specifically the section on "An attachment URL is disallowed"
</Card>

## Related

<CardGroup cols={2}>
  <Card title="Airtable Integration" icon="database" href="/integrations-api/airtable">
    Complete Airtable setup guide
  </Card>

  <Card title="Send Email" icon="envelope" href="/features/actions-after-document-generation/send-email">
    Email configuration options
  </Card>
</CardGroup>